Transfer the updated jtube.jar file to your phone. You can do this via a MicroSD card reader, Bluetooth, or by downloading it directly through an opera mini browser on the phone.
As YouTube transitioned to more complex APIs and high-definition codecs, these classic "dumbphones" lost the ability to stream video. JTube bridges that gap by acting as a lightweight interface that parses YouTube content into a format these vintage devices can actually handle. Why the "Updated" Jar Matters jtube jar updated
java -jar jtube.jar